Juno Therapeutics to Report Second Quarter 2017 Financial Results on Thursday, August 3

Juno Therapeutics, Inc. (NASDAQ: JUNO) will announce financial results
for the second quarter 2017 on Thursday, August 3, 2017, after the close
of U.S.-based financial markets. Following the announcement, Juno
management will host a conference call and live webcast to provide a
business update and discuss financial results beginning at 2:00 p.m.
Pacific Time (PT) / 5:00 p.m. Eastern Time (ET).

Analysts and investors can participate in the conference call by dialing
(855) 780-7198 for domestic callers and (631) 485-4870 for international
callers, using the conference ID# 61926954.

The webcast can be accessed live on the Investor Relations page of
Juno's website, www.JunoTherapeutics.com,
and will be available for replay for 30 days following the call.

ABOUT JUNO

Juno Therapeutics is building a fully integrated biopharmaceutical
company focused on developing innovative cellular immunotherapies for
the treatment of cancer. Founded on the vision that the use of human
cells as therapeutic entities will drive one of the next important
phases in medicine, Juno is developing cell-based cancer immunotherapies
based on chimeric antigen receptor and high-affinity T cell receptor
technologies to genetically engineer T cells to recognize and kill
cancer. Juno is developing multiple cell-based product candidates to
treat a variety of B-cell malignancies as well as multiple solid tumors
and multiple myeloma. Several product candidates have shown compelling
clinical responses in clinical trials in refractory leukemia and
lymphoma conducted to date. Juno's long-term aim is to leverage its
cell-based platform to develop new product candidates that address a
broader range of cancers and human diseases. Juno brings together
innovative technologies from some of the world's leading research
institutions, including the Fred Hutchinson Cancer Research
Center, Memorial Sloan Kettering Cancer Center, Seattle Children's
Research Institute (SCRI), the University of California, San Francisco,
and The National Cancer Institute. Juno Therapeutics has an exclusive
license to the St. Jude Children’s Research Hospital patented technology
for CD19-directed product candidates that use 4-1BB, which was developed
by Dario Campana, Chihaya Imai, and St. Jude Children’s Research
Hospital. Juno’s product candidate JCAR017 was developed in
collaboration with SCRI and others.

FORWARD-LOOKING STATEMENTS

This press release contains “forward-looking statements” within the
meaning of the Private Securities Litigation Reform Act of 1995, Section
27A of the Securities Act of 1933, and Section 21E of the Securities
Exchange Act of 1934, including statements regarding Juno’s mission,
progress, and business plans, and the anticipated timing of the
financial results release and business update. Forward-looking
statements are subject to risks and uncertainties that could cause
actual results to differ materially from such forward-looking
statements, and reported results should not be considered as an
indication of future performance. These risks and uncertainties include,
but are not limited to, risks associated with: the success, cost, and
timing of Juno's product development activities and clinical trials;
Juno's ability to obtain regulatory approval for and to commercialize
its product candidates; Juno's ability to establish a
commercially-viable manufacturing process and manufacturing
infrastructure; regulatory requirements and regulatory developments;
success of Juno's competitors with respect to competing treatments and
technologies; Juno's dependence on third-party collaborators and other
contractors in Juno's research and development activities, including for
the conduct of clinical trials and the manufacture of Juno's product
candidates; Juno’s ability to attract and retain key scientific, quality
control/assurance, manufacturing or management personnel; Juno's
dependence on Celgene for the development and commercialization outside
of North America and China of Juno’s CD19 product candidates and any
other product candidates for which Celgene exercises an option; Juno’s
dependence on JW Therapeutics (Shanghai) Co., Ltd, over which Juno does
not exercise complete control, for the development and commercialization
of product candidates in China; Juno's ability to obtain, maintain, or
protect intellectual property rights related to its product candidates;
amongst others. For a further description of the risks and uncertainties
that could cause actual results to differ from those expressed in these
forward-looking statements, as well as risks relating to Juno's business
in general, see Juno's Quarterly Report on Form 10-Q filed with
the Securities and Exchange Commission on May 4, 2017 and Juno’s other
periodic reports filed with the Securities and Exchange Commission.
These forward-looking statements speak only as of the date hereof. Juno
disclaims any obligation to update these forward-looking statements.

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